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Re: mmap'ed memory cacheable or uncheable

To: Teresa Tao <Teresat@tridentmicro.com>
Subject: Re: mmap'ed memory cacheable or uncheable
From: Jun Sun <jsun@mvista.com>
Date: Fri, 25 Jul 2003 15:02:24 -0700
Cc: linux-mips@linux-mips.org, jsun@mvista.com
In-reply-to: <61F6477DE6BED311B69F009027C3F58403AA3969@EXCHANGE>; from Teresat@tridentmicro.com on Thu, Jul 24, 2003 at 08:26:59PM -0700
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <61F6477DE6BED311B69F009027C3F58403AA3969@EXCHANGE>
Sender: linux-mips-bounce@linux-mips.org
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On Thu, Jul 24, 2003 at 08:26:59PM -0700, Teresa Tao wrote:
> Hi there,
> 
> I got a question regarding the mmap'ed memory. Is the mmap'ed memory 
> cacheable or uncheable? My driver just use the remap_page_range to map a 
> reserved physical memory.
>

I am pretty much sure it is cached, although I can't pin down exactly
where in the mm subsystem it does so - I have had cache bugs related
to mmap().

Jun

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